Fix -Wdeprecated-copy compiler warnings with gcc 9

(partial cherry pick from commit 05d109215d)

src/game_classification.cpp

@@ -28,27 +28,6 @@ static lg::log_domain log_engine("engine");
 /// The default difficulty setting for campaigns.
 const std::string DEFAULT_DIFFICULTY("NORMAL");
 
-game_classification::game_classification()
-	: label()
-	, version()
-	, campaign_type()
-	, campaign_define()
-	, campaign_xtra_defines()
-	, scenario_define()
-	, era_define()
-	, mod_defines()
-	, campaign()
-	, campaign_name()
-	, abbrev()
-	, end_credits(true)
-	, end_text()
-	, end_text_duration()
-	, difficulty(DEFAULT_DIFFICULTY)
-	, random_mode("")
-	, oos_debug(false)
-{
-}
-
 game_classification::game_classification(const config& cfg)
 	: label(cfg["label"])
 	, version(cfg["version"])
@@ -71,27 +50,6 @@ game_classification::game_classification(const config& cfg)
 {
 }
 
-game_classification::game_classification(const game_classification& gc)
-	: label(gc.label)
-	, version(gc.version)
-	, campaign_type(gc.campaign_type)
-	, campaign_define(gc.campaign_define)
-	, campaign_xtra_defines(gc.campaign_xtra_defines)
-	, scenario_define(gc.scenario_define)
-	, era_define(gc.era_define)
-	, mod_defines(gc.mod_defines)
-	, campaign(gc.campaign)
-	, campaign_name(gc.campaign_name)
-	, abbrev(gc.abbrev)
-	, end_credits(gc.end_credits)
-	, end_text(gc.end_text)
-	, end_text_duration(gc.end_text_duration)
-	, difficulty(gc.difficulty)
-	, random_mode(gc.random_mode)
-	, oos_debug(gc.oos_debug)
-{
-}
-
 config game_classification::to_config() const
 {
 	config cfg;

src/game_classification.hpp

@@ -27,9 +27,8 @@ extern const std::string DEFAULT_DIFFICULTY;
 class game_classification
 {
 public:
-	game_classification();
+	game_classification() = default;
 	explicit game_classification(const config& cfg);
-	game_classification(const game_classification& gc);
 
 	config to_config() const;
 	std::string get_tagname() const;
@@ -54,10 +53,10 @@ public:
 	std::string campaign_name;                       /**< The name of the campaign being played. */
 
 	std::string abbrev;                              /**< the campaign abbreviation */
-	bool end_credits;                                /**< whether to show the standard credits at the end */
+	bool end_credits = true;                                /**< whether to show the standard credits at the end */
 	std::string end_text;                            /**< end-of-campaign text */
 	unsigned int end_text_duration;                  /**< for how long the end-of-campaign text is shown */
-	std::string difficulty; /**< The difficulty level the game is being played on. */
-	std::string random_mode;
-	bool oos_debug;
+	std::string difficulty = DEFAULT_DIFFICULTY; /**< The difficulty level the game is being played on. */
+	std::string random_mode = "";
+	bool oos_debug = false;
 };

src/picture.cpp

@@ -358,17 +358,6 @@ locator& locator::operator=(const locator& a)
 	return *this;
 }
 
-locator::value::value(const locator::value& a)
-	: type_(a.type_)
-	, is_data_uri_(a.is_data_uri_)
-	, filename_(a.filename_)
-	, loc_(a.loc_)
-	, modifications_(a.modifications_)
-	, center_x_(a.center_x_)
-	, center_y_(a.center_y_)
-{
-}
-
 locator::value::value()
 	: type_(NONE)
 	, is_data_uri_(false)

src/picture.hpp

@@ -42,7 +42,6 @@ namespace image {
 		void parse_arguments();
 		struct value {
 			value();
-			value(const value &a);
 			value(const char *filename);
 			value(const std::string& filename);
 			value(const std::string& filename, const std::string& modifications);

src/widgets/widget.cpp

@@ -30,14 +30,6 @@ namespace gui {
 
 bool widget::mouse_lock_ = false;
 
-widget::widget(const widget &o)
-	: events::sdl_handler(), focus_(o.focus_), video_(o.video_), restorer_(o.restorer_), rect_(o.rect_),
-	   needs_restore_(o.needs_restore_), state_(o.state_), hidden_override_(o.hidden_override_),
-	  enabled_(o.enabled_), clip_(o.clip_), clip_rect_(o.clip_rect_), volatile_(o.volatile_),
-	  help_text_(o.help_text_), tooltip_text_(o.tooltip_text_), help_string_(o.help_string_), id_(o.id_), mouse_lock_local_(o.mouse_lock_local_)
-{
-}
-
 widget::widget(CVideo& video, const bool auto_join)
 	: events::sdl_handler(auto_join), focus_(true), video_(&video), rect_(EmptyRect), needs_restore_(false),
 	  state_(UNINIT), hidden_override_(false), enabled_(true), clip_(false),

src/widgets/widget.hpp

@@ -69,7 +69,6 @@ public:
 	virtual void process_tooltip_string(int mousex, int mousey);
 
 protected:
-	widget(const widget& o);
 	widget(CVideo& video, const bool auto_join=true);
 	virtual ~widget();